Hi Ynse..Those are the right springs for an M20 from about 1941/2 onwards that used them in conjunction with the hexagonal spring support pieces. Early M20s used longer parallel springs I believe...and studding instead of the hexagonal supports...Ian
Can you post a photo showing the right set up for a 1941 M20? I'm really confused now, I've been told all sort of stories now. I bought a couple of those long studs for under the springs, but they shouldn't be on my bike now? Sorry for hijacking this thread by the way.